No, all hazmats have different protection properties and are similar to their attire counterparts. One thing to note though, bio suits are not equal to their attire counterparts, so it does benefit you to switch to your regular gearset in oxygenated environments.
Tier 1: Yellow Hazmat (Burlap Clothing)
Tier 2: Blue Hazmat (Wooden Gearset)
Tier 3: Green Hazmat (Roadsign Gearset)
Tier 4: Heavy Hazmat (Full Metal Gearset)
Blue, Green, and Heavy hazmats can be found in crates across the map as well as dropped by scientists occasionally. They are also available at Cobalt Outpost in exchange for scrap.